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        <h2 id="vecotr变长数组倍增思想"><a class="markdownIt-Anchor" href="#vecotr变长数组倍增思想"></a> vecotr(变长数组，倍增思想)</h2>
<blockquote>
<p>size()  返回元素个数<br>
empty()  返回是否为空<br>
clear()  清空<br>
front()/back()<br>
push_back()/pop_back()<br>
begin()/end()<br>
[]<br>
支持比较运算，按字典序</p>
</blockquote>
<a id="more"></a>
<h2 id="pairintint"><a class="markdownIt-Anchor" href="#pairintint"></a> pair&lt;int,int&gt;</h2>
<blockquote>
<p>first<br>
second<br>
支持比较运算，以first为第一个关键字，以second为第二个关键字（字典序）</p>
</blockquote>
<h2 id="string字符串"><a class="markdownIt-Anchor" href="#string字符串"></a> string(字符串)</h2>
<blockquote>
<p>size()/length()  返回字符串长度<br>
empty()<br>
clear()<br>
substr(起始下标，(子串长度))  返回子串<br>
c_str()  返回字符串所在字符数组的起始地址</p>
</blockquote>
<h2 id="stack栈"><a class="markdownIt-Anchor" href="#stack栈"></a> stack(栈)</h2>
<blockquote>
<p>size()<br>
empty()<br>
push()  向栈顶插入一个元素<br>
top()  返回栈顶元素<br>
pop()  弹出栈顶元素</p>
</blockquote>
<h2 id="queue队列"><a class="markdownIt-Anchor" href="#queue队列"></a> queue(队列)</h2>
<blockquote>
<p>size()<br>
empty()<br>
push()  向队尾插入一个元素<br>
front()  返回队头元素<br>
back()  返回队尾元素<br>
pop()  弹出队头元素</p>
</blockquote>
<h2 id="priority_queue优先队列默认时大根堆"><a class="markdownIt-Anchor" href="#priority_queue优先队列默认时大根堆"></a> priority_queue(优先队列,默认时大根堆)</h2>
<blockquote>
<p>push()  插入一个元素<br>
top()  返回堆顶元素<br>
pop()  弹出堆顶元素<br>
定义成小根堆的方式：priority_queue&lt;int, vector<int>, greater<int>&gt; q;</int></int></p>
</blockquote>
<h2 id="deque双端队列"><a class="markdownIt-Anchor" href="#deque双端队列"></a> deque(双端队列)</h2>
<blockquote>
<p>size()<br>
empty()<br>
clear()<br>
front()/back()<br>
push_back()/pop_back()<br>
push_front()/pop_front()<br>
begin()/end()<br>
[]</p>
</blockquote>
<h2 id="set-map-multiset-multimap-基于平衡二叉树红黑树动态维护有序序列"><a class="markdownIt-Anchor" href="#set-map-multiset-multimap-基于平衡二叉树红黑树动态维护有序序列"></a> set, map, multiset, multimap, 基于平衡二叉树（红黑树），动态维护有序序列</h2>
<blockquote>
<p>size()<br>
empty()<br>
clear()<br>
begin()/end()<br>
++, – 返回前驱和后继，时间复杂度 O(logn)</p>
</blockquote>
<h3 id="setmultiset"><a class="markdownIt-Anchor" href="#setmultiset"></a> set/multiset</h3>
<blockquote>
<p>insert()  插入一个数<br>
find()  查找一个数<br>
count()  返回某一个数的个数<br>
erase()<br>
(1) 输入是一个数x，删除所有x   O(k + logn)<br>
(2) 输入一个迭代器，删除这个迭代器<br>
lower_bound()/upper_bound()<br>
lower_bound(x)  返回大于等于x的最小的数的迭代器<br>
upper_bound(x)  返回大于x的最小的数的迭代器</p>
</blockquote>
<h3 id="mapmultimap"><a class="markdownIt-Anchor" href="#mapmultimap"></a> map/multimap</h3>
<blockquote>
<p>insert()  插入的数是一个pair<br>
erase()  输入的参数是pair或者迭代器<br>
find()<br>
[]   时间复杂度是 O(logn)<br>
lower_bound()/upper_bound()</p>
</blockquote>
<h2 id="unordered_multisetunordered_multimapunordered_setunordered_map基于哈希表动态维护无序序列"><a class="markdownIt-Anchor" href="#unordered_multisetunordered_multimapunordered_setunordered_map基于哈希表动态维护无序序列"></a> unordered_multiset,unordered_multimap,unordered_set,unordered_map,基于哈希表,动态维护无序序列</h2>
<blockquote>
<p>和上面类似，增删改查的时间复杂度是 O(1)<br>
不支持 lower_bound()/upper_bound()， 迭代器的++，- -</p>
</blockquote>

    </div>

    
    
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        <div style="text-align:center;color: #ccc;font-size:14px;">-------------本文结束<i class="fa fa-paw"></i>感谢您的阅读-------------</div>
    
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